<template>
  <div>
    <div class="search">
      <input v-model="keyword" class="input" type="text" placeholder="输入城市名或拼音">
    </div>
    <div v-show="keyword" ref="wrapper" class="list-search">
      <ul>
        <li class="item" v-for="item in list" :key="item.id" @click="handCityClick(item.name)">{{item.name}}</li>
        <li class="item" v-show="isShow">没有查询到匹配的数据</li>
      </ul>
    </div>
  </div>
</template>

<script>
// 引入better-scroll
import Bscroll from 'better-scroll'
export default {
  name: 'Search',
  props: {
    cities: Object
  },
  data () {
    return {
      keyword: '',
      timer: null,
      list: [] // 用来存储查询到的城市
    }
  },
  computed: {
    isShow () {
      return !this.list.length
    }
  },
  methods: {
    handCityClick (city) {
      this.$store.dispatch('changeCity', city)
      // console.log(city)
      this.$router.push('/')
    }
  },
  watch: {
    keyword () {
      // 函数截流
      if (this.timer) {
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities) { // 循环的是传递过来的城市对象
          this.cities[i].forEach((value) => {
            if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1) {
              result.push(value)
            }
          })
        }
        this.list = result
      }, 100)
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  }
}
</script>
<style lang="stylus" scoped>
  .search{
    height:.44rem;
    background-color :#00bcd4;
    padding:0 .1rem;
    box-sizing border-box
    .input{
      box-sizing border-box
      width:100%;
      border-radius :.04rem;
      height:.3rem;
      margin:.1rem 0;
      text-align center
      padding :0 .1rem;
      color:#666;
    }
  }
  .list-search{
    overflow hidden
    position absolute
    top:.87rem;
    left:0;
    right:0;
    bottom:0;
    background-color:#eaeaea;
    z-index 1
    .item{
      padding-left :.1rem;
      line-height :.28rem;
      border-bottom :.01rem solid #cacaca
      background-color white
    }
  }
  .search-box{
    overflow hidden
  }
</style>
